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<li><a class="reference internal" href="#">Codec registry and support functions</a><ul>
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  <div class="section" id="codec-registry-and-support-functions">
<span id="codec-registry"></span><h1>Codec registry and support functions<a class="headerlink" href="#codec-registry-and-support-functions" title="Permalink to this headline">¶</a></h1>
<dl class="function">
<dt id="c.PyCodec_Register">
int <code class="sig-name descname">PyCodec_Register</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *search_function</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_Register" title="Permalink to this definition">¶</a></dt>
<dd><p>Register a new codec search function.</p>
<p>As side effect, this tries to load the <code class="xref py py-mod docutils literal notranslate"><span class="pre">encodings</span></code> package, if not yet
done, to make sure that it is always first in the list of search functions.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_KnownEncoding">
int <code class="sig-name descname">PyCodec_KnownEncoding</code><span class="sig-paren">(</span>const char<em> *encoding</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_KnownEncoding" title="Permalink to this definition">¶</a></dt>
<dd><p>Return <code class="docutils literal notranslate"><span class="pre">1</span></code> or <code class="docutils literal notranslate"><span class="pre">0</span></code> depending on whether there is a registered codec for
the given <em>encoding</em>.  This function always succeeds.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_Encode">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_Encode</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *object</em>, const char<em> *encoding</em>, const char<em> *errors</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_Encode" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Generic codec based encoding API.</p>
<p><em>object</em> is passed through the encoder function found for the given
<em>encoding</em> using the error handling method defined by <em>errors</em>.  <em>errors</em> may
be <code class="docutils literal notranslate"><span class="pre">NULL</span></code> to use the default method defined for the codec.  Raises a
<a class="reference internal" href="../library/exceptions.html#LookupError" title="LookupError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">LookupError</span></code></a> if no encoder can be found.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_Decode">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_Decode</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *object</em>, const char<em> *encoding</em>, const char<em> *errors</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_Decode" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Generic codec based decoding API.</p>
<p><em>object</em> is passed through the decoder function found for the given
<em>encoding</em> using the error handling method defined by <em>errors</em>.  <em>errors</em> may
be <code class="docutils literal notranslate"><span class="pre">NULL</span></code> to use the default method defined for the codec.  Raises a
<a class="reference internal" href="../library/exceptions.html#LookupError" title="LookupError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">LookupError</span></code></a> if no encoder can be found.</p>
</dd></dl>

<div class="section" id="codec-lookup-api">
<h2>Codec lookup API<a class="headerlink" href="#codec-lookup-api" title="Permalink to this headline">¶</a></h2>
<p>In the following functions, the <em>encoding</em> string is looked up converted to all
lower-case characters, which makes encodings looked up through this mechanism
effectively case-insensitive.  If no codec is found, a <a class="reference internal" href="../library/exceptions.html#KeyError" title="KeyError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">KeyError</span></code></a> is set
and <code class="docutils literal notranslate"><span class="pre">NULL</span></code> returned.</p>
<dl class="function">
<dt id="c.PyCodec_Encoder">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_Encoder</code><span class="sig-paren">(</span>const char<em> *encoding</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_Encoder" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Get an encoder function for the given <em>encoding</em>.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_Decoder">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_Decoder</code><span class="sig-paren">(</span>const char<em> *encoding</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_Decoder" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Get a decoder function for the given <em>encoding</em>.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_IncrementalEncoder">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_IncrementalEncoder</code><span class="sig-paren">(</span>const char<em> *encoding</em>, const char<em> *errors</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_IncrementalEncoder" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Get an <a class="reference internal" href="../library/codecs.html#codecs.IncrementalEncoder" title="codecs.IncrementalEncoder"><code class="xref py py-class docutils literal notranslate"><span class="pre">IncrementalEncoder</span></code></a> object for the given <em>encoding</em>.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_IncrementalDecoder">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_IncrementalDecoder</code><span class="sig-paren">(</span>const char<em> *encoding</em>, const char<em> *errors</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_IncrementalDecoder" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Get an <a class="reference internal" href="../library/codecs.html#codecs.IncrementalDecoder" title="codecs.IncrementalDecoder"><code class="xref py py-class docutils literal notranslate"><span class="pre">IncrementalDecoder</span></code></a> object for the given <em>encoding</em>.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_StreamReader">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_StreamReader</code><span class="sig-paren">(</span>const char<em> *encoding</em>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *stream</em>, const char<em> *errors</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_StreamReader" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Get a <a class="reference internal" href="../library/codecs.html#codecs.StreamReader" title="codecs.StreamReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamReader</span></code></a> factory function for the given <em>encoding</em>.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_StreamWriter">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_StreamWriter</code><span class="sig-paren">(</span>const char<em> *encoding</em>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *stream</em>, const char<em> *errors</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_StreamWriter" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Get a <a class="reference internal" href="../library/codecs.html#codecs.StreamWriter" title="codecs.StreamWriter"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamWriter</span></code></a> factory function for the given <em>encoding</em>.</p>
</dd></dl>

</div>
<div class="section" id="registry-api-for-unicode-encoding-error-handlers">
<h2>Registry API for Unicode encoding error handlers<a class="headerlink" href="#registry-api-for-unicode-encoding-error-handlers" title="Permalink to this headline">¶</a></h2>
<dl class="function">
<dt id="c.PyCodec_RegisterError">
int <code class="sig-name descname">PyCodec_RegisterError</code><span class="sig-paren">(</span>const char<em> *name</em>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *error</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_RegisterError" title="Permalink to this definition">¶</a></dt>
<dd><p>Register the error handling callback function <em>error</em> under the given <em>name</em>.
This callback function will be called by a codec when it encounters
unencodable characters/undecodable bytes and <em>name</em> is specified as the error
parameter in the call to the encode/decode function.</p>
<p>The callback gets a single argument, an instance of
<a class="reference internal" href="../library/exceptions.html#UnicodeEncodeError" title="UnicodeEncodeError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">UnicodeEncodeError</span></code></a>, <a class="reference internal" href="../library/exceptions.html#UnicodeDecodeError" title="UnicodeDecodeError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">UnicodeDecodeError</span></code></a> or
<a class="reference internal" href="../library/exceptions.html#UnicodeTranslateError" title="UnicodeTranslateError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">UnicodeTranslateError</span></code></a> that holds information about the problematic
sequence of characters or bytes and their offset in the original string (see
<a class="reference internal" href="exceptions.html#unicodeexceptions"><span class="std std-ref">Unicode Exception Objects</span></a> for functions to extract this information).  The
callback must either raise the given exception, or return a two-item tuple
containing the replacement for the problematic sequence, and an integer
giving the offset in the original string at which encoding/decoding should be
resumed.</p>
<p>Return <code class="docutils literal notranslate"><span class="pre">0</span></code> on success, <code class="docutils literal notranslate"><span class="pre">-1</span></code> on error.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_LookupError">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_LookupError</code><span class="sig-paren">(</span>const char<em> *name</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_LookupError" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Lookup the error handling callback function registered under <em>name</em>.  As a
special case <code class="docutils literal notranslate"><span class="pre">NULL</span></code> can be passed, in which case the error handling callback
for “strict” will be returned.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_StrictErrors">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_StrictErrors</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *exc</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_StrictErrors" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: Always NULL.</em><p>Raise <em>exc</em> as an exception.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_IgnoreErrors">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_IgnoreErrors</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *exc</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_IgnoreErrors" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Ignore the unicode error, skipping the faulty input.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_ReplaceErrors">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_ReplaceErrors</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *exc</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_ReplaceErrors" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Replace the unicode encode error with <code class="docutils literal notranslate"><span class="pre">?</span></code> or <code class="docutils literal notranslate"><span class="pre">U+FFFD</span></code>.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_XMLCharRefReplaceErrors">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_XMLCharRefReplaceErrors</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *exc</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_XMLCharRefReplaceErrors" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Replace the unicode encode error with XML character references.</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_BackslashReplaceErrors">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_BackslashReplaceErrors</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *exc</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_BackslashReplaceErrors" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Replace the unicode encode error with backslash escapes (<code class="docutils literal notranslate"><span class="pre">\x</span></code>, <code class="docutils literal notranslate"><span class="pre">\u</span></code> and
<code class="docutils literal notranslate"><span class="pre">\U</span></code>).</p>
</dd></dl>

<dl class="function">
<dt id="c.PyCodec_NameReplaceErrors">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="sig-name descname">PyCodec_NameReplaceErrors</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *exc</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCodec_NameReplaceErrors" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Replace the unicode encode error with <code class="docutils literal notranslate"><span class="pre">\N{...}</span></code> escapes.</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.5.</span></p>
</div>
</dd></dl>

</div>
</div>


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  <h3><a href="../contents.html">Table of Contents</a></h3>
  <ul>
<li><a class="reference internal" href="#">Codec registry and support functions</a><ul>
<li><a class="reference internal" href="#codec-lookup-api">Codec lookup API</a></li>
<li><a class="reference internal" href="#registry-api-for-unicode-encoding-error-handlers">Registry API for Unicode encoding error handlers</a></li>
</ul>
</li>
</ul>

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